It's not just tonight. Joe has consistently failed to get the most out of this talented roster. Say whatever you want about the regular season statistics. Those don't matter.
I'm actually not that upset about losing to the Heat. I thought that they were the better team overall. And even mid-way through the Atlanta series, I never believed in this team. Too inconsistent, lack of composure, inability to execute, terrible coaching, etc. We managed to make it this far in spite of Joe, not because of him.
A roster this talented should not play as poorly as we did, and it happened multiple times in this series alone. Underachieved big time. Championship windows are usually short-lived. Wasted season.